What Would Be a Primary Advantage of Passive Immunity with Diseases

Multiple Choice

What would be a primary advantage of passive immunity with diseases such as tetanus or botulism?

A) Time. You can quickly neutralize the toxin with a passive administration of antibodies to save the patient's life when no is available for them to make their own active immune response.
B) Cost. It's far cheaper to administer a dose of antibodies harvested from the serum of an actively-immunized animal or human than it is to administer a vaccine.
C) Safety of delivery. It's far safer to administer a dose of antibodies harvested from the serum of an actively-immunized animal or human than it is to administer a vaccine.
D) Handling of treatment. It's difficult to keep vaccines stored properly to keep their potency, especially in 3^rd world countries without adequate 'cold chains' for transport into jungles and deserts. It's much easier to keep a batch of antibodies stable, even in extremes of heat and humidity.